"""The HedgeDoc note, as markdown. It only covers challenges included in this CTF."""
from __future__ import annotations

from collections import Counter
from datetime import datetime

from .challenge import BLOCKED_ICON, STATUS_ICON, STATUS_ORDER
from .overview import Overview, icons

REPO_URL = "https://gitea.cato447.de/cato447/challenge_status_tracker"


def md_cell(v: str) -> str:
    return v.replace("|", "\\|")


def render_hedgedoc(ov: Overview, title: str, tags: str = "") -> str:
    stamp = datetime.now().astimezone().strftime("%Y-%m-%d %H:%M:%S %Z")
    stages = ov.stages
    groups = ov.by_category()
    total = Counter(ch.stage for ch in ov.challenges)
    L = []
    if tags:
        # HedgeDoc reads this YAML block off the top of the note
        L += ["---", f"tags: {tags}", "---", ""]
    L += [f"# {title}", "",
          f"**Last updated:** {stamp}", "",
          f"*generated by [challenge_status_tracker]({REPO_URL}) from the README.md of every challenge "
          f"included in this CTF — {len(ov.challenges)} challenges*", "",
          " · ".join(f"{STATUS_ICON[s]} **{s or 'unknown'}** {total[s]}"
                     for s in stages if total[s] or s), ""]

    ready = ov.testable
    L += [f"## ✅ Ready for infra testing ({len(ready)} of {len(ov.challenges)})", "",
          "*every included challenge at Testing Ready or beyond whose repo backs that up — "
          "these can be deployed and tested against the infrastructure now*", ""]
    if ready:
        L += ["| | Challenge | Category | Difficulty | Status | Event | Author | Tester |",
              "| --- | --- | --- | --- | --- | --- | --- | --- |"]
        for ch in ready:
            L.append("| " + " | ".join(md_cell(x) for x in (
                STATUS_ICON[ch.stage], f"[{ch.title}]({ch.repo.web_url})",
                ch.category or "?", ch.difficulty or "?", ch.stage, ch.get("Event"),
                ch.get("Author"), ch.get("Tester") if ch.has_tester else "—")) + " |")
    else:
        L.append("*nothing yet*")
    L.append("")

    if ov.blocked:
        L += [f"## {BLOCKED_ICON} Claims Testing Ready+, but the repo disagrees "
              f"({len(ov.blocked)})", "",
              "*the README says so, but description.yml or the repo shows it is not "
              "finished — kept out of challs.txt until this is fixed*", ""]
        for ch in ov.blocked:
            L.append(f"- {STATUS_ICON[ch.stage]} [{md_cell(ch.title)}]({ch.repo.web_url}) "
                     f"({ch.stage}): " + "; ".join(ch.blockers))
        L.append("")

    L += ["## Status by category", "",
          "| Category | " + " | ".join(f"{STATUS_ICON[s]} {s or '?'}" for s in stages)
          + " | total |",
          "| --- |" + " ---: |" * (len(stages) + 1)]
    for cat in ov.categories:
        chs = groups.get(cat, [])
        cnt = Counter(ch.stage for ch in chs)
        L.append(f"| {cat} | " + " | ".join(str(cnt[s] or "·") for s in stages)
                 + f" | **{len(chs)}** |")
    L.append("| **total** | " + " | ".join(f"**{total[s]}**" for s in stages)
             + f" | **{len(ov.challenges)}** |")

    diffs = ov.difficulties
    L += ["", "## Category × difficulty", "",
          "*one dot per challenge, coloured by status: "
          + " ".join(f"{STATUS_ICON[s]} {s}" for s in STATUS_ORDER)
          + f" {BLOCKED_ICON} blocked*", "",
          "| Category | " + " | ".join(diffs) + " | total |",
          "| --- |" + " --- |" * len(diffs) + " ---: |"]
    for cat in ov.categories:
        chs = groups.get(cat, [])
        cells = [icons([ch for ch in chs if (ch.difficulty or "?") == d]) or "·" for d in diffs]
        L.append(f"| {cat} | " + " | ".join(cells) + f" | **{len(chs)}** |")
    dtot = Counter(ch.difficulty or "?" for ch in ov.challenges)
    L.append("| **total** | " + " | ".join(f"**{dtot[d]}**" for d in diffs)
             + f" | **{len(ov.challenges)}** |")

    L += ["", "## Challenges"]
    for cat in ov.categories:
        chs = groups.get(cat)
        if not chs:
            continue
        L += ["", f"### {cat} ({len(chs)})", "",
              "| | Challenge | Difficulty | Status | Event | Author | Tester | Last activity |",
              "| --- | --- | --- | --- | --- | --- | --- | --- |"]
        for ch in chs:
            status = ch.stage or "?"
            if ch.status_raw.lower() != status.lower():
                status += f" *({ch.status_raw})*"
            cat_raw = ch.get("Category", "")
            name = f"[{md_cell(ch.title)}]({ch.repo.web_url})"
            if cat_raw.lower() != cat:
                name += f" *({cat_raw})*"
            L.append("| " + " | ".join(md_cell(x) for x in (
                ch.icon, name, ch.difficulty or ch.get("Difficulty"), status,
                ch.get("Event"), ch.get("Author"),
                ch.get("Tester") if ch.has_tester else "—", ch.repo.last_activity)) + " |")

    L += ["", "## Needs attention", ""]
    issues = [ch for ch in sorted(ov.challenges, key=lambda c: c.repo.path.lower()) if ch.problems]
    for ch in issues:
        L.append(f"- [{md_cell(ch.title)}]({ch.repo.web_url}): " + "; ".join(ch.problems))
    for ch in ov.blank:
        why = "no README" if ch.repo.readme is None else "README is still the blank template"
        L.append(f"- [{ch.repo.path}]({ch.repo.web_url}): {why}")
    for path in ov.unknown:
        L.append(f"- {path}: in challenges.yml, but no such repo")
    if not issues and not ov.blank and not ov.unknown:
        L.append("*nothing — every README is filled in. suspicious.*")
    return "\n".join(L) + "\n"